<template>
  <view v-if="showPopup" class="uni-popup" :class="[popupstyle]" @touchmove.stop.prevent="clear">
    <uni-transition v-if="maskShow" :mode-class="['fade']" :styles="maskClass" :duration="duration" :show="showTrans"
     @click="onTap" />
    <uni-transition :mode-class="ani" :styles="transClass" :duration="duration" :show="showTrans" @click="onTap">
      <view class="uni-popup__wrapper-box" @click.stop="clear">
        <slot />
      </view>
    </uni-transition>
  </view>
</template>

<script>
import uniTransition from '../uni-transition/uni-transition.vue'
import popup from './popup.js'
/**
   * PopUp 弹出层
   * @description 弹出层组件，为了解决遮罩弹层的问题
   * @tutorial https://ext.dcloud.net.cn/plugin?id=329
   * @property {String} type = [top|center|bottom] 弹出方式
   *   @value top 顶部弹出
   *   @value center 中间弹出
   *   @value bottom 底部弹出
   *   @value message 消息提示
   *   @value dialog 对话框
   *   @value share 底部分享示例
   * @property {Boolean} animation = [ture|false] 是否开启动画
   * @property {Boolean} maskClick = [ture|false] 蒙版点击是否关闭弹窗
   * @event {Function} change 打开关闭弹窗触发，e={show: false}
   */

export default {
  name: 'UniPopup',
  components: {
    uniTransition
  },
  props: {
    // 开启动画
    animation: {
      type: Boolean,
      default: true
    },
    // 弹出层类型，可选值，top: 顶部弹出层；bottom：底部弹出层；center：全屏弹出层
    // message: 消息提示 ; dialog : 对话框
    type: {
      type: String,
      default: 'center'
    },
    // maskClick
    maskClick: {
      type: Boolean,
      default: true
    }
  },
  provide () {
    return {
      popup: this
    }
  },
  mixins: [popup],
  watch: {
    /**
       * 监听type类型
       */
    type: {
      handler: function (newVal) {
        this[this.config[newVal]]()
      },
      immediate: true
    },
    /**
       * 监听遮罩是否可点击
       * @param {Object} val
       */
    maskClick (val) {
      this.mkclick = val
    }
  },
  data () {
    return {
      duration: 300,
      ani: [],
      showPopup: false,
      showTrans: false,
      maskClass: {
        position: 'fixed',
        bottom: 0,
        top: 0,
        left: 0,
        right: 0,
        backgroundColor: 'rgba(0, 0, 0, 0.4)'
      },
      transClass: {
        position: 'fixed',
        left: 0,
        right: 0
      },
      maskShow: true,
      mkclick: true,
      popupstyle: 'top'
    }
  },
  created () {
    this.mkclick = this.maskClick
    if (this.animation) {
      this.duration = 300
    } else {
      this.duration = 0
    }
  },
  methods: {
    clear (e) {
      // TODO nvue 取消冒泡
      e.stopPropagation()
    },
    open () {
      this.showPopup = true
      this.$nextTick(() => {
        new Promise(resolve => {
          clearTimeout(this.timer)
          this.timer = setTimeout(() => {
            this.showTrans = true
            // fixed by mehaotian 兼容 app 端
            this.$nextTick(() => {
              resolve()
            })
          }, 50)
        }).then(res => {
          // 自定义打开事件
          clearTimeout(this.msgtimer)
          this.msgtimer = setTimeout(() => {
            this.customOpen && this.customOpen()
          }, 100)
          this.$emit('change', {
            show: true,
            type: this.type
          })
        })
      })
    },
    close (type) {
      this.showTrans = false
      this.$nextTick(() => {
        this.$emit('change', {
          show: false,
          type: this.type
        })
        clearTimeout(this.timer)
        // 自定义关闭事件
        this.customOpen && this.customClose()
        this.timer = setTimeout(() => {
          this.showPopup = false
        }, 300)
      })
    },
    onTap () {
      if (!this.mkclick) return
      this.close()
    },
    /**
       * 顶部弹出样式处理
       */
    top () {
      this.popupstyle = 'top'
      this.ani = ['slide-top']
      this.transClass = {
        position: 'fixed',
        left: 0,
        right: 0
      }
    },
    /**
       * 底部弹出样式处理
       */
    bottom () {
      this.popupstyle = 'bottom'
      this.ani = ['slide-bottom']
      this.transClass = {
        position: 'fixed',
        left: 0,
        right: 0,
        bottom: 0
      }
    },
    /**
       * 中间弹出样式处理
       */
    center () {
      this.popupstyle = 'center'
      this.ani = ['zoom-out', 'fade']
      this.transClass = {
        position: 'fixed',
        /* #ifndef APP-NVUE */
        display: 'flex',
        flexDirection: 'column',
        /* #endif */
        bottom: 0,
        left: 0,
        right: 0,
        top: 0,
        justifyContent: 'center',
        alignItems: 'center'
      }
    }
  }
}
</script>
<style lang="scss" scoped>
  .uni-popup {
    position: fixed;
    /* #ifndef APP-NVUE */
    z-index: 99;
    /* #endif */
  }

  .uni-popup__mask {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: $uni-bg-color-mask;
    opacity: 0;
  }

  .mask-ani {
    transition-property: opacity;
    transition-duration: 0.2s;
  }

  .uni-top-mask {
    opacity: 1;
  }

  .uni-bottom-mask {
    opacity: 1;
  }

  .uni-center-mask {
    opacity: 1;
  }

  .uni-popup__wrapper {
    /* #ifndef APP-NVUE */
    display: block;
    /* #endif */
    position: absolute;
  }

  .top {
    /* #ifdef H5 */
    top: var(--window-top);
    /* #endif */
    /* #ifndef H5 */
    top: 0;
    /* #endif */
  }

  .bottom {
    bottom: 0;
  }

  .uni-popup__wrapper-box {
    /* #ifndef APP-NVUE */
    display: block;
    /* #endif */
    position: relative;
    /* iphonex 等安全区设置，底部安全区适配 */
    /* #ifndef APP-NVUE */
    padding-bottom: constant(safe-area-inset-bottom);
    padding-bottom: env(safe-area-inset-bottom);
    /* #endif */
  }

  .content-ani {
    // transition: transform 0.3s;
    transition-property: transform, opacity;
    transition-duration: 0.2s;
  }

  .uni-top-content {
    transform: translateY(0);
  }

  .uni-bottom-content {
    transform: translateY(0);
  }

  .uni-center-content {
    transform: scale(1);
    opacity: 1;
  }
</style>
